Drying roll for paper-making machinery



H. H. VAUGHAN. I

DRYING ROLL FOR PAPER MAKING MACHINERY.

APPHCATION FILED APR. 3. I920- l,4 32,65.. Patented 00$. 17, 1922.

1g it tion water.

Patented Get. 17, 1922.

Wi estares HENRY a. VAUGHAN, or MONTREAL, QUEBEC, CANADA.

DRYING ROLL PAPER-MAKING IIIAaCHINFBJY.

application filed April 2, 1520. Serial No. 371,059.

whichpap'er or mill board is carried around a number of drums heated by steam or other suitable means and is held in position upon the drums during travel around the same by suction,

My invention consists of the particular construction and arrangement of parts hereinafterfdescribed and pointed out in the claims. l p e For full comprehension, however, of my invention reference must be had to'the accompanying drawings in which similar reference characters indicate the same parts and wherein:

Figure 1 is a' side elevation partly in longitudinal section of a dryer roll con structed according to myinvention;

Figure 2 is atransverse sectional view taken on line 2-2 Fig. 1;

F i ure 3 is a'sectional view taken on line 3-3 ig.1;,

Figure 4 is a detail fragmentary sectional view of the valvular means controlling suction through the periphery of the roll;

Figure 5 is a detail elevation of one of the valvular members; and

Figures .6, 7 and 8 are detail views of the means for clamping the valvular member in position. i a p In the embodiment illustrated each drum of my improved drying means consists of a hollow cylindrical member 2 the ends of which are closed by covers 3 and 4 the cylindrical portion of the drum being perforated throughout its length as at 5 the perforations being arranged in circumferential series. The drum ismounted in standards 6 by means of trunnions 7 and 8 formed integrally with the covers the trunnion 7 being bored axially to accommodate the pipe (not shown) for supplying the steam or other heating medium to the interior of the drum and for the exhaust of the condensa- A plurality of longitudinal tapered pipes 9 are arranged in circumferential series and each. is connected to the perforations 5 immediately adjacent by means of short branch radial pipes '10. These longitudinal pipes extend from their tapered ends in close proximity to the cover 3 to a spider adjacent to cover d, the hub of the spiderbeing constituted by an inward extension of trunnion 8 and radial pipes 13 the-outer end of'each of which is connected to one of the pipes 9. Suction through perforations 5, pipes 10 and longitudinal pipes 9 is caused by a suction device illustrated diagrammatically at 14 which is connected thereto by a Valve-controlled pipe line 15. The valvular mechanism controlling communication between this pipe line and the pipe system within the drum consists of two valvular members, one member being constituted by the trunnion 8 which is rotatable in unison with the drum. This trunnion has a series of longitudinal passages 16 in spaced annular arrangement in cross section and extending from end to end of the trunnion and having their inner ends in communication with the pipes 13 their opposite ends being adapted to communicate with a valve chamber 17 within the valve. casing 18. This second valve member is held against rotation by a clamp 19 which straddles one of a pair of elongated bolts 20 screwed into the machine frame. These bolts constitute part of the means for maintaining the fixed valve member in bearing relation with the outer end of the trunnion 8 such meansalso including a saddle plate 21 carried by the bolts and encircling the'pipe line 15 and a helical spring 22 bearing between the saddle plate and the valve member 18 and encircling the pipe line 15. The valve chamber in the member 18 is of semicircular form and is adapted to effect communication between a plurality of the passages simultaneously; the number which will communicate will,

however, depend upon the extent of the member. This is permitted by slots 23 in the clamp 19 which accommodate clamping screws 24 which are screwed into the fixed member 18.

Operation.

As the drum rotates it carries with it trunnion 8 and the longitudinal pipes 9 with branch pipes 10 and 13. Suction devices having been set'in motion a vacuum is maintained-in the valve chamber 17 and as rotation continues the passages 16 will successively come into communication with the valve chamber thereby causing suction through ipes 13 communicating with said passages pipes 10 and theirrespective perforations. Communication between the passages 16 and valve chamber should take place slightly in advance of the point at which the paper-goes on the drum and such communication should continue until immediately after the paper leaves the same.

What I claim is as follows:

1. In paper making machinery the combination with a rotary hollow perforated drum for drying paper and the like, said drum having an opening for admitting a heating medium to its interior, or means for causing suction. through said perfo ations for the purpose of maintaining the paper "to be dried in position upon the periphery of drum while in contact with the latter, said means consisting of a suction pipe line, a plurality of pipes within the drum extending longitudinally of the same, a plurality oi branch pipes eii'ecting communication between each of the longitudinal pipes and the perforations, and valvular means connect ing said longitudinal pipes to the suction pipe line, such valvular means consisting of a stationary member and a member rotatable in unison with the drum and coacting with the stationary member. i

2. In paper making machinery the combination with a rotary hollow perforated drum for drying paper and the like, said drum having an opening for admitting a heating medium to its interior, of means for causing suction through said perforations for the purpose of maintaining the paper to be dried in position upon the periphery of drum while in contact with the latter, said means consisting of a suction device, pipes extending longitudinally within the drum and arrangel in circumferential series, a plurality of branch pipes eiiecting communication between each of the longitudinal pipes and. the perforations in the drum, means eliecting communication between the longitudinal pipes and the suction device, said means including a valvular member rotatable in unison with the drum and consisting of a trunnion on one end of the drum and cont-c inlng a plurallty of passages to which sald longitudinal pipes are connected,

of adjustment of the member for .thepurand a stationary valvular member controlling said passages.

In paper making machlnery the combnation with'themachineframe and a hollow perforated drum for drying paper and the like, of means for causing suction through said perforations said means consisting of a suction clevice pipesextending longitudinally within the drum and arranged in circumferential series, a pluralityofzbranch pipes effecting communication between-leach of 'the longitudinal pipes and the perforations in the drum, means effecting eommu nication between'the longitudinal pipe's and the suction device, said means including a valvular member rotatable lIl-1111iSOIl with the drum and consisting of a trunnion'on one end of the drum and containing a plurality of passages to whichsaid longitudinal pipes are connected, and a'statlonary valvular member controlling'"said passages; means for yieldingly maintaining said stationary member against the outer end 'of" the trunnion, said means consisting of' a saddle plate, bolts securing said-p'latetothe machine frame, and a spring bearingbetween said plate and stationary valvular member, and means for preventing rotation of said stationary-member, and permitting pose of advancing or retardingthe point at which communication between the suction device and thepassagesis effecteda. In paper making machinery he combination with a rotary hollow perforated 'clrum for drying paper and the like said-drum having an opening for admitting a hea'tin'g medium to its interior; of means for causthe purpose of maintaining the papertoxbe dried in position upon the periphery of drum while in contact with. the latter; said" means consisting'of a suction pipe line, a plurality of pipes withinthe drum-extend.

mg longitudinally of the same, .aplurality oi branch pipes elfectingcommunication between each of the longitudinal pipes and the perforations, and valvular 'means connecting said longitudinal pipesto the suction pipe line, such valvular means consisting of a stationary member'anda member rotatable in unison with the drum andcoacting with the stationary member, one of said members beingadjustableiorthe purpose of advancing orretarding the point at which communication between the suction device andthe longitudinal pipes is :effecte' d for the purpose set forth; i

In testimony whereof I have signed my name to this specification inthepresence of two witnesses. i

HENRY H. VAUGHAN.

lVitnesses: I

Gonnon Ur. CooKn, IVILLIAM J C. Hswnrson.

mg suction through said perforations for 

